mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-29 23:10:26 +00:00
dc810e3900
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
1546 lines
45 KiB
C
1546 lines
45 KiB
C
/* BFD back-end for Intel 960 b.out binaries.
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001
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Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "genlink.h"
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#include "bout.h"
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#include "aout/stab_gnu.h"
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#include "libaout.h" /* BFD a.out internal data structures. */
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static int aligncode PARAMS ((bfd *abfd, asection *input_section, arelent *r, unsigned int shrink));
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static void perform_slip PARAMS ((bfd *abfd, unsigned int slip, asection *input_section, bfd_vma value));
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static boolean b_out_squirt_out_relocs PARAMS ((bfd *abfd, asection *section));
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static const bfd_target * b_out_callback PARAMS ((bfd *));
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static bfd_reloc_status_type calljx_callback PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR src, PTR dst, asection *));
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static bfd_reloc_status_type callj_callback PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR data, unsigned int srcidx, unsigned int dstidx, asection *, boolean));
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static bfd_vma get_value PARAMS ((arelent *, struct bfd_link_info *, asection *));
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static int abs32code PARAMS ((bfd *, asection *, arelent *, unsigned int, struct bfd_link_info *));
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static boolean b_out_bfd_relax_section PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
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static bfd_byte * b_out_bfd_get_relocated_section_contents PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *, boolean, asymbol **));
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static int b_out_sizeof_headers PARAMS ((bfd *, boolean));
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static boolean b_out_set_arch_mach PARAMS ((bfd *, enum bfd_architecture, unsigned long));
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static boolean b_out_set_section_contents PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
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static long b_out_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
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static long b_out_canonicalize_reloc PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
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static boolean b_out_slurp_reloc_table PARAMS ((bfd *, sec_ptr, asymbol **));
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static reloc_howto_type * b_out_bfd_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
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static boolean b_out_write_object_contents PARAMS ((bfd *));
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static int b_out_symbol_cmp PARAMS ((const void *, const void *));
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static boolean b_out_mkobject PARAMS ((bfd *));
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static const bfd_target * b_out_object_p PARAMS ((bfd *));
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void bout_swap_exec_header_in PARAMS ((bfd *, struct external_exec *, struct internal_exec *));
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void bout_swap_exec_header_out PARAMS ((bfd *, struct internal_exec *, struct external_exec *));
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/* Swaps the information in an executable header taken from a raw byte
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stream memory image, into the internal exec_header structure. */
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void
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bout_swap_exec_header_in (abfd, raw_bytes, execp)
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bfd *abfd;
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struct external_exec *raw_bytes;
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struct internal_exec *execp;
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{
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struct external_exec *bytes = (struct external_exec *)raw_bytes;
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/* Now fill in fields in the execp, from the bytes in the raw data. */
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execp->a_info = H_GET_32 (abfd, bytes->e_info);
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execp->a_text = GET_WORD (abfd, bytes->e_text);
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execp->a_data = GET_WORD (abfd, bytes->e_data);
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execp->a_bss = GET_WORD (abfd, bytes->e_bss);
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execp->a_syms = GET_WORD (abfd, bytes->e_syms);
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execp->a_entry = GET_WORD (abfd, bytes->e_entry);
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execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
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execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
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execp->a_tload = GET_WORD (abfd, bytes->e_tload);
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execp->a_dload = GET_WORD (abfd, bytes->e_dload);
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execp->a_talign = bytes->e_talign[0];
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execp->a_dalign = bytes->e_dalign[0];
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execp->a_balign = bytes->e_balign[0];
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execp->a_relaxable = bytes->e_relaxable[0];
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}
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/* Swaps the information in an internal exec header structure into the
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supplied buffer ready for writing to disk. */
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void
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bout_swap_exec_header_out (abfd, execp, raw_bytes)
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bfd *abfd;
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struct internal_exec *execp;
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struct external_exec *raw_bytes;
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{
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struct external_exec *bytes = (struct external_exec *)raw_bytes;
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/* Now fill in fields in the raw data, from the fields in the exec struct. */
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H_PUT_32 (abfd, execp->a_info , bytes->e_info);
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PUT_WORD (abfd, execp->a_text , bytes->e_text);
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PUT_WORD (abfd, execp->a_data , bytes->e_data);
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PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
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PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
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PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
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PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
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PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
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PUT_WORD (abfd, execp->a_tload , bytes->e_tload);
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PUT_WORD (abfd, execp->a_dload , bytes->e_dload);
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bytes->e_talign[0] = execp->a_talign;
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bytes->e_dalign[0] = execp->a_dalign;
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bytes->e_balign[0] = execp->a_balign;
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bytes->e_relaxable[0] = execp->a_relaxable;
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}
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static const bfd_target *
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b_out_object_p (abfd)
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bfd *abfd;
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{
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struct internal_exec anexec;
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struct external_exec exec_bytes;
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bfd_size_type amt = EXEC_BYTES_SIZE;
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if (bfd_bread ((PTR) &exec_bytes, amt, abfd) != amt)
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{
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if (bfd_get_error () != bfd_error_system_call)
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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anexec.a_info = H_GET_32 (abfd, exec_bytes.e_info);
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if (N_BADMAG (anexec))
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{
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bfd_set_error (bfd_error_wrong_format);
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return 0;
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}
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bout_swap_exec_header_in (abfd, &exec_bytes, &anexec);
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return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback);
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}
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/* Finish up the opening of a b.out file for reading. Fill in all the
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fields that are not handled by common code. */
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static const bfd_target *
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b_out_callback (abfd)
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bfd *abfd;
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{
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struct internal_exec *execp = exec_hdr (abfd);
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unsigned long bss_start;
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/* Architecture and machine type. */
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bfd_set_arch_mach(abfd,
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bfd_arch_i960, /* B.out only used on i960 */
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bfd_mach_i960_core /* Default */
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);
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/* The positions of the string table and symbol table. */
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obj_str_filepos (abfd) = N_STROFF (*execp);
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obj_sym_filepos (abfd) = N_SYMOFF (*execp);
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/* The alignments of the sections. */
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obj_textsec (abfd)->alignment_power = execp->a_talign;
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obj_datasec (abfd)->alignment_power = execp->a_dalign;
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obj_bsssec (abfd)->alignment_power = execp->a_balign;
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/* The starting addresses of the sections. */
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obj_textsec (abfd)->vma = execp->a_tload;
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obj_datasec (abfd)->vma = execp->a_dload;
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obj_textsec (abfd)->lma = obj_textsec (abfd)->vma;
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obj_datasec (abfd)->lma = obj_datasec (abfd)->vma;
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/* And reload the sizes, since the aout module zaps them. */
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obj_textsec (abfd)->_raw_size = execp->a_text;
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bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
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obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
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obj_bsssec (abfd)->lma = obj_bsssec (abfd)->vma;
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/* The file positions of the sections. */
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obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
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obj_datasec (abfd)->filepos = N_DATOFF(*execp);
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/* The file positions of the relocation info. */
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obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
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obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
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adata(abfd).page_size = 1; /* Not applicable. */
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adata(abfd).segment_size = 1; /* Not applicable. */
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adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
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if (execp->a_relaxable)
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abfd->flags |= BFD_IS_RELAXABLE;
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return abfd->xvec;
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}
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struct bout_data_struct
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{
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struct aoutdata a;
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struct internal_exec e;
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};
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static boolean
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b_out_mkobject (abfd)
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bfd *abfd;
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{
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struct bout_data_struct *rawptr;
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bfd_size_type amt = sizeof (struct bout_data_struct);
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rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, amt);
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if (rawptr == NULL)
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return false;
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abfd->tdata.bout_data = rawptr;
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exec_hdr (abfd) = &rawptr->e;
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obj_textsec (abfd) = (asection *) NULL;
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obj_datasec (abfd) = (asection *) NULL;
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obj_bsssec (abfd) = (asection *) NULL;
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return true;
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}
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static int
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b_out_symbol_cmp (a_ptr, b_ptr)
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const void * a_ptr;
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const void * b_ptr;
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{
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struct aout_symbol ** a = (struct aout_symbol **) a_ptr;
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struct aout_symbol ** b = (struct aout_symbol **) b_ptr;
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asection *sec;
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bfd_vma av, bv;
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/* Primary key is address. */
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sec = bfd_get_section (&(*a)->symbol);
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av = sec->output_section->vma + sec->output_offset + (*a)->symbol.value;
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sec = bfd_get_section (&(*b)->symbol);
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bv = sec->output_section->vma + sec->output_offset + (*b)->symbol.value;
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if (av < bv)
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return -1;
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if (av > bv)
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return 1;
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/* Secondary key puts CALLNAME syms last and BALNAME syms first, so
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that they have the best chance of being contiguous. */
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if (IS_BALNAME ((*a)->other) || IS_CALLNAME ((*b)->other))
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return -1;
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if (IS_CALLNAME ((*a)->other) || IS_BALNAME ((*b)->other))
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return 1;
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return 0;
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}
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static boolean
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b_out_write_object_contents (abfd)
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bfd *abfd;
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{
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struct external_exec swapped_hdr;
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bfd_size_type amt;
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if (! aout_32_make_sections (abfd))
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return false;
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exec_hdr (abfd)->a_info = BMAGIC;
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exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
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exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
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exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
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exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
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exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
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exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
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sizeof (struct relocation_info));
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exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
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sizeof (struct relocation_info));
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exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
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exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
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exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
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exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
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exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
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bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
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amt = EXEC_BYTES_SIZE;
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if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
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|| bfd_bwrite ((PTR) &swapped_hdr, amt, abfd) != amt)
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return false;
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/* Now write out reloc info, followed by syms and strings */
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if (bfd_get_symcount (abfd) != 0)
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{
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/* Make sure {CALL,BAL}NAME symbols remain adjacent on output
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by sorting. This is complicated by the fact that stabs are
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also ordered. Solve this by shifting all stabs to the end
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in order, then sorting the rest. */
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asymbol **outsyms, **p, **q;
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outsyms = bfd_get_outsymbols (abfd);
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p = outsyms + bfd_get_symcount (abfd);
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for (q = p--; p >= outsyms; p--)
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{
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if ((*p)->flags & BSF_DEBUGGING)
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{
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asymbol *t = *--q;
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*q = *p;
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*p = t;
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}
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}
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if (q > outsyms)
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qsort (outsyms, (size_t) (q - outsyms), sizeof (asymbol*),
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b_out_symbol_cmp);
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/* Back to your regularly scheduled program. */
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if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*exec_hdr(abfd))), SEEK_SET)
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!= 0)
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return false;
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if (! aout_32_write_syms (abfd))
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return false;
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if (bfd_seek (abfd, (file_ptr) (N_TROFF(*exec_hdr(abfd))), SEEK_SET)
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!= 0)
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return false;
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if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
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if (bfd_seek (abfd, (file_ptr) (N_DROFF(*exec_hdr(abfd))), SEEK_SET)
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!= 0)
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return false;
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if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
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}
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return true;
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}
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/* Some reloc hackery. */
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#define CALLS 0x66003800 /* Template for 'calls' instruction */
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#define BAL 0x0b000000 /* Template for 'bal' instruction */
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#define BAL_MASK 0x00ffffff
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#define BALX 0x85f00000 /* Template for 'balx' instruction */
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#define BALX_MASK 0x0007ffff
|
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#define CALL 0x09000000
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#define PCREL13_MASK 0x1fff
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|
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#define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
|
||
|
||
/* Magic to turn callx into calljx. */
|
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static bfd_reloc_status_type
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calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section)
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bfd *abfd;
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struct bfd_link_info *link_info;
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arelent *reloc_entry;
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PTR src;
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||
PTR dst;
|
||
asection *input_section;
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{
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int word = bfd_get_32 (abfd, src);
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asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
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aout_symbol_type *symbol = aout_symbol (symbol_in);
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bfd_vma value;
|
||
|
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value = get_value (reloc_entry, link_info, input_section);
|
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|
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if (IS_CALLNAME (symbol->other))
|
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{
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aout_symbol_type *balsym = symbol+1;
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int inst = bfd_get_32 (abfd, (bfd_byte *) src-4);
|
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/* The next symbol should be an N_BALNAME. */
|
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BFD_ASSERT (IS_BALNAME (balsym->other));
|
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inst &= BALX_MASK;
|
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inst |= BALX;
|
||
bfd_put_32 (abfd, (bfd_vma) inst, (bfd_byte *) dst-4);
|
||
symbol = balsym;
|
||
value = (symbol->symbol.value
|
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+ output_addr (symbol->symbol.section));
|
||
}
|
||
|
||
word += value + reloc_entry->addend;
|
||
|
||
bfd_put_32 (abfd, (bfd_vma) word, dst);
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Magic to turn call into callj. */
|
||
|
||
static bfd_reloc_status_type
|
||
callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx,
|
||
input_section, shrinking)
|
||
bfd *abfd;
|
||
struct bfd_link_info *link_info;
|
||
arelent *reloc_entry;
|
||
PTR data;
|
||
unsigned int srcidx;
|
||
unsigned int dstidx;
|
||
asection *input_section;
|
||
boolean shrinking;
|
||
{
|
||
int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx);
|
||
asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
|
||
aout_symbol_type *symbol = aout_symbol (symbol_in);
|
||
bfd_vma value;
|
||
|
||
value = get_value (reloc_entry, link_info, input_section);
|
||
|
||
if (IS_OTHER(symbol->other))
|
||
{
|
||
/* Call to a system procedure - replace code with system
|
||
procedure number. */
|
||
word = CALLS | (symbol->other - 1);
|
||
}
|
||
else if (IS_CALLNAME(symbol->other))
|
||
{
|
||
aout_symbol_type *balsym = symbol+1;
|
||
|
||
/* The next symbol should be an N_BALNAME. */
|
||
BFD_ASSERT(IS_BALNAME(balsym->other));
|
||
|
||
/* We are calling a leaf, so replace the call instruction with a
|
||
bal. */
|
||
word = BAL | ((word
|
||
+ output_addr (balsym->symbol.section)
|
||
+ balsym->symbol.value + reloc_entry->addend
|
||
- dstidx
|
||
- output_addr (input_section))
|
||
& BAL_MASK);
|
||
}
|
||
else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0)
|
||
{
|
||
/* A callj against a symbol in the same section is a fully
|
||
resolved relative call. We don't need to do anything here.
|
||
If the symbol is not in the same section, I'm not sure what
|
||
to do; fortunately, this case will probably never arise. */
|
||
BFD_ASSERT (! shrinking);
|
||
BFD_ASSERT (symbol->symbol.section == input_section);
|
||
}
|
||
else
|
||
{
|
||
word = CALL | (((word & BAL_MASK)
|
||
+ value
|
||
+ reloc_entry->addend
|
||
- (shrinking ? dstidx : 0)
|
||
- output_addr (input_section))
|
||
& BAL_MASK);
|
||
}
|
||
bfd_put_32 (abfd, (bfd_vma) word, (bfd_byte *) data + dstidx);
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* type rshift size bitsize pcrel bitpos absolute overflow check*/
|
||
|
||
#define ABS32CODE 0
|
||
#define ABS32CODE_SHRUNK 1
|
||
#define PCREL24 2
|
||
#define CALLJ 3
|
||
#define ABS32 4
|
||
#define PCREL13 5
|
||
#define ABS32_MAYBE_RELAXABLE 1
|
||
#define ABS32_WAS_RELAXABLE 2
|
||
|
||
#define ALIGNER 10
|
||
#define ALIGNDONE 11
|
||
static reloc_howto_type howto_reloc_callj =
|
||
HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
|
||
static reloc_howto_type howto_reloc_abs32 =
|
||
HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false);
|
||
static reloc_howto_type howto_reloc_pcrel24 =
|
||
HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
|
||
|
||
static reloc_howto_type howto_reloc_pcrel13 =
|
||
HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
|
||
|
||
static reloc_howto_type howto_reloc_abs32codeshrunk =
|
||
HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
|
||
|
||
static reloc_howto_type howto_reloc_abs32code =
|
||
HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false);
|
||
|
||
static reloc_howto_type howto_align_table[] = {
|
||
HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false),
|
||
HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false),
|
||
HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false),
|
||
HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false),
|
||
};
|
||
|
||
static reloc_howto_type howto_done_align_table[] = {
|
||
HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false),
|
||
HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false),
|
||
HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false),
|
||
HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false),
|
||
};
|
||
|
||
static reloc_howto_type *
|
||
b_out_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd ATTRIBUTE_UNUSED;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
switch (code)
|
||
{
|
||
default:
|
||
return 0;
|
||
case BFD_RELOC_I960_CALLJ:
|
||
return &howto_reloc_callj;
|
||
case BFD_RELOC_32:
|
||
case BFD_RELOC_CTOR:
|
||
return &howto_reloc_abs32;
|
||
case BFD_RELOC_24_PCREL:
|
||
return &howto_reloc_pcrel24;
|
||
}
|
||
}
|
||
|
||
/* Allocate enough room for all the reloc entries, plus pointers to them all. */
|
||
|
||
static boolean
|
||
b_out_slurp_reloc_table (abfd, asect, symbols)
|
||
bfd *abfd;
|
||
sec_ptr asect;
|
||
asymbol **symbols;
|
||
{
|
||
register struct relocation_info *rptr;
|
||
unsigned int counter;
|
||
arelent *cache_ptr;
|
||
int extern_mask, pcrel_mask, callj_mask, length_shift;
|
||
int incode_mask;
|
||
int size_mask;
|
||
bfd_vma prev_addr = 0;
|
||
unsigned int count;
|
||
bfd_size_type reloc_size, amt;
|
||
struct relocation_info *relocs;
|
||
arelent *reloc_cache;
|
||
|
||
if (asect->relocation)
|
||
return true;
|
||
|
||
if (!aout_32_slurp_symbol_table (abfd))
|
||
return false;
|
||
|
||
if (asect == obj_datasec (abfd))
|
||
{
|
||
reloc_size = exec_hdr(abfd)->a_drsize;
|
||
goto doit;
|
||
}
|
||
|
||
if (asect == obj_textsec (abfd))
|
||
{
|
||
reloc_size = exec_hdr(abfd)->a_trsize;
|
||
goto doit;
|
||
}
|
||
|
||
if (asect == obj_bsssec (abfd))
|
||
{
|
||
reloc_size = 0;
|
||
goto doit;
|
||
}
|
||
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return false;
|
||
|
||
doit:
|
||
if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
|
||
return false;
|
||
count = reloc_size / sizeof (struct relocation_info);
|
||
|
||
relocs = (struct relocation_info *) bfd_malloc (reloc_size);
|
||
if (!relocs && reloc_size != 0)
|
||
return false;
|
||
|
||
amt = ((bfd_size_type) count + 1) * sizeof (arelent);
|
||
reloc_cache = (arelent *) bfd_malloc (amt);
|
||
if (!reloc_cache)
|
||
{
|
||
if (relocs != NULL)
|
||
free (relocs);
|
||
return false;
|
||
}
|
||
|
||
if (bfd_bread ((PTR) relocs, reloc_size, abfd) != reloc_size)
|
||
{
|
||
free (reloc_cache);
|
||
if (relocs != NULL)
|
||
free (relocs);
|
||
return false;
|
||
}
|
||
|
||
if (bfd_header_big_endian (abfd))
|
||
{
|
||
/* Big-endian bit field allocation order. */
|
||
pcrel_mask = 0x80;
|
||
extern_mask = 0x10;
|
||
incode_mask = 0x08;
|
||
callj_mask = 0x02;
|
||
size_mask = 0x20;
|
||
length_shift = 5;
|
||
}
|
||
else
|
||
{
|
||
/* Little-endian bit field allocation order. */
|
||
pcrel_mask = 0x01;
|
||
extern_mask = 0x08;
|
||
incode_mask = 0x10;
|
||
callj_mask = 0x40;
|
||
size_mask = 0x02;
|
||
length_shift = 1;
|
||
}
|
||
|
||
for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
|
||
counter < count;
|
||
counter++, rptr++, cache_ptr++)
|
||
{
|
||
unsigned char *raw = (unsigned char *)rptr;
|
||
unsigned int symnum;
|
||
|
||
cache_ptr->address = H_GET_32 (abfd, raw + 0);
|
||
cache_ptr->howto = 0;
|
||
|
||
if (bfd_header_big_endian (abfd))
|
||
symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
|
||
else
|
||
symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
|
||
|
||
if (raw[7] & extern_mask)
|
||
{
|
||
/* If this is set then the r_index is a index into the symbol table;
|
||
if the bit is not set then r_index contains a section map.
|
||
We either fill in the sym entry with a pointer to the symbol,
|
||
or point to the correct section. */
|
||
cache_ptr->sym_ptr_ptr = symbols + symnum;
|
||
cache_ptr->addend = 0;
|
||
}
|
||
else
|
||
{
|
||
/* In a.out symbols are relative to the beginning of the
|
||
file rather than sections ?
|
||
(look in translate_from_native_sym_flags)
|
||
The reloc entry addend has added to it the offset into the
|
||
file of the data, so subtract the base to make the reloc
|
||
section relative. */
|
||
int s;
|
||
|
||
/* Sign-extend symnum from 24 bits to whatever host uses. */
|
||
s = symnum;
|
||
if (s & (1 << 23))
|
||
s |= (~0) << 24;
|
||
|
||
cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
|
||
switch (s)
|
||
{
|
||
case N_TEXT:
|
||
case N_TEXT | N_EXT:
|
||
cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr;
|
||
cache_ptr->addend = - obj_textsec (abfd)->vma;
|
||
break;
|
||
case N_DATA:
|
||
case N_DATA | N_EXT:
|
||
cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr;
|
||
cache_ptr->addend = - obj_datasec (abfd)->vma;
|
||
break;
|
||
case N_BSS:
|
||
case N_BSS | N_EXT:
|
||
cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr;
|
||
cache_ptr->addend = - obj_bsssec (abfd)->vma;
|
||
break;
|
||
case N_ABS:
|
||
case N_ABS | N_EXT:
|
||
cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr;
|
||
cache_ptr->addend = 0;
|
||
break;
|
||
case -2: /* .align */
|
||
if (raw[7] & pcrel_mask)
|
||
{
|
||
cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3];
|
||
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
}
|
||
else
|
||
{
|
||
/* .org? */
|
||
abort ();
|
||
}
|
||
cache_ptr->addend = 0;
|
||
break;
|
||
default:
|
||
BFD_ASSERT(0);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* The i960 only has a few relocation types:
|
||
abs 32-bit and pcrel 24bit. except for callj's! */
|
||
if (cache_ptr->howto != 0)
|
||
;
|
||
else if (raw[7] & callj_mask)
|
||
{
|
||
cache_ptr->howto = &howto_reloc_callj;
|
||
}
|
||
else if ( raw[7] & pcrel_mask)
|
||
{
|
||
if (raw[7] & size_mask)
|
||
cache_ptr->howto = &howto_reloc_pcrel13;
|
||
else
|
||
cache_ptr->howto = &howto_reloc_pcrel24;
|
||
}
|
||
else
|
||
{
|
||
if (raw[7] & incode_mask)
|
||
cache_ptr->howto = &howto_reloc_abs32code;
|
||
else
|
||
cache_ptr->howto = &howto_reloc_abs32;
|
||
}
|
||
|
||
if (cache_ptr->address < prev_addr)
|
||
{
|
||
/* Ouch! this reloc is out of order, insert into the right place. */
|
||
arelent tmp;
|
||
arelent *cursor = cache_ptr-1;
|
||
bfd_vma stop = cache_ptr->address;
|
||
|
||
tmp = *cache_ptr;
|
||
while (cursor->address > stop && cursor >= reloc_cache)
|
||
{
|
||
cursor[1] = cursor[0];
|
||
cursor--;
|
||
}
|
||
|
||
cursor[1] = tmp;
|
||
}
|
||
else
|
||
{
|
||
prev_addr = cache_ptr->address;
|
||
}
|
||
}
|
||
|
||
if (relocs != NULL)
|
||
free (relocs);
|
||
asect->relocation = reloc_cache;
|
||
asect->reloc_count = count;
|
||
|
||
return true;
|
||
}
|
||
|
||
static boolean
|
||
b_out_squirt_out_relocs (abfd, section)
|
||
bfd *abfd;
|
||
asection *section;
|
||
{
|
||
arelent **generic;
|
||
int r_extern = 0;
|
||
int r_idx;
|
||
int incode_mask;
|
||
int len_1;
|
||
unsigned int count = section->reloc_count;
|
||
struct relocation_info *native, *natptr;
|
||
bfd_size_type natsize;
|
||
int extern_mask, pcrel_mask, len_2, callj_mask;
|
||
|
||
if (count == 0)
|
||
return true;
|
||
|
||
generic = section->orelocation;
|
||
natsize = (bfd_size_type) count * sizeof (struct relocation_info);
|
||
native = ((struct relocation_info *) bfd_malloc (natsize));
|
||
if (!native && natsize != 0)
|
||
return false;
|
||
|
||
if (bfd_header_big_endian (abfd))
|
||
{
|
||
/* Big-endian bit field allocation order. */
|
||
pcrel_mask = 0x80;
|
||
extern_mask = 0x10;
|
||
len_2 = 0x40;
|
||
len_1 = 0x20;
|
||
callj_mask = 0x02;
|
||
incode_mask = 0x08;
|
||
}
|
||
else
|
||
{
|
||
/* Little-endian bit field allocation order. */
|
||
pcrel_mask = 0x01;
|
||
extern_mask = 0x08;
|
||
len_2 = 0x04;
|
||
len_1 = 0x02;
|
||
callj_mask = 0x40;
|
||
incode_mask = 0x10;
|
||
}
|
||
|
||
for (natptr = native; count > 0; --count, ++natptr, ++generic)
|
||
{
|
||
arelent *g = *generic;
|
||
unsigned char *raw = (unsigned char *)natptr;
|
||
asymbol *sym = *(g->sym_ptr_ptr);
|
||
asection *output_section = sym->section->output_section;
|
||
|
||
H_PUT_32 (abfd, g->address, raw);
|
||
/* Find a type in the output format which matches the input howto -
|
||
at the moment we assume input format == output format FIXME!! */
|
||
r_idx = 0;
|
||
/* FIXME: Need callj stuff here, and to check the howto entries to
|
||
be sure they are real for this architecture. */
|
||
if (g->howto== &howto_reloc_callj)
|
||
raw[7] = callj_mask + pcrel_mask + len_2;
|
||
else if (g->howto == &howto_reloc_pcrel24)
|
||
raw[7] = pcrel_mask + len_2;
|
||
else if (g->howto == &howto_reloc_pcrel13)
|
||
raw[7] = pcrel_mask + len_1;
|
||
else if (g->howto == &howto_reloc_abs32code)
|
||
raw[7] = len_2 + incode_mask;
|
||
else if (g->howto >= howto_align_table
|
||
&& g->howto <= (howto_align_table
|
||
+ sizeof (howto_align_table) / sizeof (howto_align_table[0])
|
||
- 1))
|
||
{
|
||
/* symnum == -2; extern_mask not set, pcrel_mask set. */
|
||
r_idx = -2;
|
||
r_extern = 0;
|
||
raw[7] = (pcrel_mask
|
||
| ((g->howto - howto_align_table) << 1));
|
||
}
|
||
else
|
||
raw[7] = len_2;
|
||
|
||
if (r_idx != 0)
|
||
/* Already mucked with r_extern, r_idx. */;
|
||
else if (bfd_is_com_section (output_section)
|
||
|| bfd_is_abs_section (output_section)
|
||
|| bfd_is_und_section (output_section))
|
||
{
|
||
if (bfd_abs_section_ptr->symbol == sym)
|
||
{
|
||
/* Whoops, looked like an abs symbol, but is really an offset
|
||
from the abs section. */
|
||
r_idx = 0;
|
||
r_extern = 0;
|
||
}
|
||
else
|
||
{
|
||
/* Fill in symbol. */
|
||
r_extern = 1;
|
||
r_idx = (*g->sym_ptr_ptr)->udata.i;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Just an ordinary section. */
|
||
r_extern = 0;
|
||
r_idx = output_section->target_index;
|
||
}
|
||
|
||
if (bfd_header_big_endian (abfd))
|
||
{
|
||
raw[4] = (unsigned char) (r_idx >> 16);
|
||
raw[5] = (unsigned char) (r_idx >> 8);
|
||
raw[6] = (unsigned char) (r_idx );
|
||
}
|
||
else
|
||
{
|
||
raw[6] = (unsigned char) (r_idx >> 16);
|
||
raw[5] = (unsigned char) (r_idx>> 8);
|
||
raw[4] = (unsigned char) (r_idx );
|
||
}
|
||
|
||
if (r_extern)
|
||
raw[7] |= extern_mask;
|
||
}
|
||
|
||
if (bfd_bwrite ((PTR) native, natsize, abfd) != natsize)
|
||
{
|
||
free ((PTR)native);
|
||
return false;
|
||
}
|
||
|
||
free ((PTR)native);
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is stupid. This function should be a boolean predicate. */
|
||
|
||
static long
|
||
b_out_canonicalize_reloc (abfd, section, relptr, symbols)
|
||
bfd *abfd;
|
||
sec_ptr section;
|
||
arelent **relptr;
|
||
asymbol **symbols;
|
||
{
|
||
arelent *tblptr;
|
||
unsigned int count;
|
||
|
||
if ((section->flags & SEC_CONSTRUCTOR) != 0)
|
||
{
|
||
arelent_chain *chain = section->constructor_chain;
|
||
|
||
for (count = 0; count < section->reloc_count; count++)
|
||
{
|
||
*relptr++ = &chain->relent;
|
||
chain = chain->next;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (section->relocation == NULL
|
||
&& ! b_out_slurp_reloc_table (abfd, section, symbols))
|
||
return -1;
|
||
|
||
tblptr = section->relocation;
|
||
for (count = 0; count++ < section->reloc_count;)
|
||
*relptr++ = tblptr++;
|
||
}
|
||
|
||
*relptr = NULL;
|
||
|
||
return section->reloc_count;
|
||
}
|
||
|
||
static long
|
||
b_out_get_reloc_upper_bound (abfd, asect)
|
||
bfd *abfd;
|
||
sec_ptr asect;
|
||
{
|
||
if (bfd_get_format (abfd) != bfd_object)
|
||
{
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
if (asect->flags & SEC_CONSTRUCTOR)
|
||
return sizeof (arelent *) * (asect->reloc_count + 1);
|
||
|
||
if (asect == obj_datasec (abfd))
|
||
return (sizeof (arelent *) *
|
||
((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
|
||
+1));
|
||
|
||
if (asect == obj_textsec (abfd))
|
||
return (sizeof (arelent *) *
|
||
((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
|
||
+1));
|
||
|
||
if (asect == obj_bsssec (abfd))
|
||
return 0;
|
||
|
||
bfd_set_error (bfd_error_invalid_operation);
|
||
return -1;
|
||
}
|
||
|
||
|
||
static boolean
|
||
b_out_set_section_contents (abfd, section, location, offset, count)
|
||
bfd *abfd;
|
||
asection *section;
|
||
PTR location;
|
||
file_ptr offset;
|
||
bfd_size_type count;
|
||
{
|
||
if (abfd->output_has_begun == false)
|
||
{
|
||
/* Set by bfd.c handler. */
|
||
if (! aout_32_make_sections (abfd))
|
||
return false;
|
||
|
||
obj_textsec (abfd)->filepos = sizeof (struct internal_exec);
|
||
obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
|
||
+ obj_textsec (abfd)->_raw_size;
|
||
}
|
||
|
||
/* Regardless, once we know what we're doing, we might as well get going. */
|
||
if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
|
||
return false;
|
||
|
||
if (count == 0)
|
||
return true;
|
||
|
||
return bfd_bwrite ((PTR) location, count, abfd) == count;
|
||
}
|
||
|
||
static boolean
|
||
b_out_set_arch_mach (abfd, arch, machine)
|
||
bfd *abfd;
|
||
enum bfd_architecture arch;
|
||
unsigned long machine;
|
||
{
|
||
bfd_default_set_arch_mach(abfd, arch, machine);
|
||
|
||
if (arch == bfd_arch_unknown) /* Unknown machine arch is OK. */
|
||
return true;
|
||
|
||
if (arch == bfd_arch_i960) /* i960 default is OK. */
|
||
switch (machine)
|
||
{
|
||
case bfd_mach_i960_core:
|
||
case bfd_mach_i960_kb_sb:
|
||
case bfd_mach_i960_mc:
|
||
case bfd_mach_i960_xa:
|
||
case bfd_mach_i960_ca:
|
||
case bfd_mach_i960_ka_sa:
|
||
case bfd_mach_i960_jx:
|
||
case bfd_mach_i960_hx:
|
||
case 0:
|
||
return true;
|
||
default:
|
||
return false;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
static int
|
||
b_out_sizeof_headers (ignore_abfd, ignore)
|
||
bfd *ignore_abfd ATTRIBUTE_UNUSED;
|
||
boolean ignore ATTRIBUTE_UNUSED;
|
||
{
|
||
return sizeof (struct internal_exec);
|
||
}
|
||
|
||
|
||
static bfd_vma
|
||
get_value (reloc, link_info, input_section)
|
||
arelent *reloc;
|
||
struct bfd_link_info *link_info;
|
||
asection *input_section;
|
||
{
|
||
bfd_vma value;
|
||
asymbol *symbol = *(reloc->sym_ptr_ptr);
|
||
|
||
/* A symbol holds a pointer to a section, and an offset from the
|
||
base of the section. To relocate, we find where the section will
|
||
live in the output and add that in. */
|
||
if (bfd_is_und_section (symbol->section))
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
/* The symbol is undefined in this BFD. Look it up in the
|
||
global linker hash table. FIXME: This should be changed when
|
||
we convert b.out to use a specific final_link function and
|
||
change the interface to bfd_relax_section to not require the
|
||
generic symbols. */
|
||
h = bfd_wrapped_link_hash_lookup (input_section->owner, link_info,
|
||
bfd_asymbol_name (symbol),
|
||
false, false, true);
|
||
if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& (h->type == bfd_link_hash_defined
|
||
|| h->type == bfd_link_hash_defweak))
|
||
value = h->u.def.value + output_addr (h->u.def.section);
|
||
else if (h != (struct bfd_link_hash_entry *) NULL
|
||
&& h->type == bfd_link_hash_common)
|
||
value = h->u.c.size;
|
||
else
|
||
{
|
||
if (! ((*link_info->callbacks->undefined_symbol)
|
||
(link_info, bfd_asymbol_name (symbol),
|
||
input_section->owner, input_section, reloc->address,
|
||
true)))
|
||
abort ();
|
||
value = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
value = symbol->value + output_addr (symbol->section);
|
||
}
|
||
|
||
/* Add the value contained in the relocation. */
|
||
value += reloc->addend;
|
||
|
||
return value;
|
||
}
|
||
|
||
static void
|
||
perform_slip (abfd, slip, input_section, value)
|
||
bfd *abfd;
|
||
unsigned int slip;
|
||
asection *input_section;
|
||
bfd_vma value;
|
||
{
|
||
asymbol **s;
|
||
|
||
s = _bfd_generic_link_get_symbols (abfd);
|
||
BFD_ASSERT (s != (asymbol **) NULL);
|
||
|
||
/* Find all symbols past this point, and make them know
|
||
what's happened. */
|
||
while (*s)
|
||
{
|
||
asymbol *p = *s;
|
||
|
||
if (p->section == input_section)
|
||
{
|
||
/* This was pointing into this section, so mangle it. */
|
||
if (p->value > value)
|
||
{
|
||
p->value -=slip;
|
||
|
||
if (p->udata.p != NULL)
|
||
{
|
||
struct generic_link_hash_entry *h;
|
||
|
||
h = (struct generic_link_hash_entry *) p->udata.p;
|
||
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
|
||
h->root.u.def.value -= slip;
|
||
BFD_ASSERT (h->root.u.def.value == p->value);
|
||
}
|
||
}
|
||
}
|
||
s++;
|
||
}
|
||
}
|
||
|
||
/* This routine works out if the thing we want to get to can be
|
||
reached with a 24bit offset instead of a 32 bit one.
|
||
If it can, then it changes the amode. */
|
||
|
||
static int
|
||
abs32code (abfd, input_section, r, shrink, link_info)
|
||
bfd *abfd;
|
||
asection *input_section;
|
||
arelent *r;
|
||
unsigned int shrink;
|
||
struct bfd_link_info *link_info;
|
||
{
|
||
bfd_vma value = get_value (r, link_info, input_section);
|
||
bfd_vma dot = output_addr (input_section) + r->address;
|
||
bfd_vma gap;
|
||
|
||
/* See if the address we're looking at within 2^23 bytes of where
|
||
we are, if so then we can use a small branch rather than the
|
||
jump we were going to. */
|
||
gap = value - (dot - shrink);
|
||
|
||
if (-1 << 23 < (long)gap && (long)gap < 1 << 23)
|
||
{
|
||
/* Change the reloc type from 32bitcode possible 24, to 24bit
|
||
possible 32. */
|
||
r->howto = &howto_reloc_abs32codeshrunk;
|
||
/* The place to relc moves back by four bytes. */
|
||
r->address -=4;
|
||
|
||
/* This will be four bytes smaller in the long run. */
|
||
shrink += 4 ;
|
||
perform_slip (abfd, 4, input_section, r->address-shrink + 4);
|
||
}
|
||
|
||
return shrink;
|
||
}
|
||
|
||
static int
|
||
aligncode (abfd, input_section, r, shrink)
|
||
bfd *abfd;
|
||
asection *input_section;
|
||
arelent *r;
|
||
unsigned int shrink;
|
||
{
|
||
bfd_vma dot = output_addr (input_section) + r->address;
|
||
bfd_vma gap;
|
||
bfd_vma old_end;
|
||
bfd_vma new_end;
|
||
unsigned int shrink_delta;
|
||
int size = r->howto->size;
|
||
|
||
/* Reduce the size of the alignment so that it's still aligned but
|
||
smaller - the current size is already the same size as or bigger
|
||
than the alignment required. */
|
||
|
||
/* Calculate the first byte following the padding before we optimize. */
|
||
old_end = ((dot + size ) & ~size) + size+1;
|
||
/* Work out where the new end will be - remember that we're smaller
|
||
than we used to be. */
|
||
new_end = ((dot - shrink + size) & ~size);
|
||
|
||
/* This is the new end. */
|
||
gap = old_end - ((dot + size) & ~size);
|
||
|
||
shrink_delta = (old_end - new_end) - shrink;
|
||
|
||
if (shrink_delta)
|
||
{
|
||
/* Change the reloc so that it knows how far to align to. */
|
||
r->howto = howto_done_align_table + (r->howto - howto_align_table);
|
||
|
||
/* Encode the stuff into the addend - for future use we need to
|
||
know how big the reloc used to be. */
|
||
r->addend = old_end - dot + r->address;
|
||
|
||
/* This will be N bytes smaller in the long run, adjust all the symbols. */
|
||
perform_slip (abfd, shrink_delta, input_section, r->address - shrink);
|
||
shrink += shrink_delta;
|
||
}
|
||
|
||
return shrink;
|
||
}
|
||
|
||
static boolean
|
||
b_out_bfd_relax_section (abfd, i, link_info, again)
|
||
bfd *abfd;
|
||
asection *i;
|
||
struct bfd_link_info *link_info;
|
||
boolean *again;
|
||
{
|
||
/* Get enough memory to hold the stuff. */
|
||
bfd *input_bfd = i->owner;
|
||
asection *input_section = i;
|
||
unsigned int shrink = 0 ;
|
||
arelent **reloc_vector = NULL;
|
||
long reloc_size = bfd_get_reloc_upper_bound (input_bfd,
|
||
input_section);
|
||
|
||
if (reloc_size < 0)
|
||
return false;
|
||
|
||
/* We only run this relaxation once. It might work to run it
|
||
multiple times, but it hasn't been tested. */
|
||
*again = false;
|
||
|
||
if (reloc_size)
|
||
{
|
||
long reloc_count;
|
||
|
||
reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
|
||
if (reloc_vector == NULL && reloc_size != 0)
|
||
goto error_return;
|
||
|
||
/* Get the relocs and think about them. */
|
||
reloc_count =
|
||
bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector,
|
||
_bfd_generic_link_get_symbols (input_bfd));
|
||
if (reloc_count < 0)
|
||
goto error_return;
|
||
if (reloc_count > 0)
|
||
{
|
||
arelent **parent;
|
||
|
||
for (parent = reloc_vector; *parent; parent++)
|
||
{
|
||
arelent *r = *parent;
|
||
|
||
switch (r->howto->type)
|
||
{
|
||
case ALIGNER:
|
||
/* An alignment reloc. */
|
||
shrink = aligncode (abfd, input_section, r, shrink);
|
||
break;
|
||
case ABS32CODE:
|
||
/* A 32bit reloc in an addressing mode. */
|
||
shrink = abs32code (input_bfd, input_section, r, shrink,
|
||
link_info);
|
||
break;
|
||
case ABS32CODE_SHRUNK:
|
||
shrink += 4;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
input_section->_cooked_size = input_section->_raw_size - shrink;
|
||
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return true;
|
||
error_return:
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return false;
|
||
}
|
||
|
||
static bfd_byte *
|
||
b_out_bfd_get_relocated_section_contents (output_bfd, link_info, link_order,
|
||
data, relocateable, symbols)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
/* Get enough memory to hold the stuff. */
|
||
bfd *input_bfd = link_order->u.indirect.section->owner;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
long reloc_size = bfd_get_reloc_upper_bound (input_bfd,
|
||
input_section);
|
||
arelent **reloc_vector = NULL;
|
||
long reloc_count;
|
||
|
||
if (reloc_size < 0)
|
||
goto error_return;
|
||
|
||
/* If producing relocateable output, don't bother to relax. */
|
||
if (relocateable)
|
||
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
|
||
link_order,
|
||
data, relocateable,
|
||
symbols);
|
||
|
||
reloc_vector = (arelent **) bfd_malloc ((bfd_size_type) reloc_size);
|
||
if (reloc_vector == NULL && reloc_size != 0)
|
||
goto error_return;
|
||
|
||
input_section->reloc_done = 1;
|
||
|
||
/* Read in the section. */
|
||
BFD_ASSERT (true == bfd_get_section_contents (input_bfd,
|
||
input_section,
|
||
data,
|
||
(bfd_vma) 0,
|
||
input_section->_raw_size));
|
||
|
||
reloc_count = bfd_canonicalize_reloc (input_bfd,
|
||
input_section,
|
||
reloc_vector,
|
||
symbols);
|
||
if (reloc_count < 0)
|
||
goto error_return;
|
||
if (reloc_count > 0)
|
||
{
|
||
arelent **parent = reloc_vector;
|
||
arelent *reloc ;
|
||
unsigned int dst_address = 0;
|
||
unsigned int src_address = 0;
|
||
unsigned int run;
|
||
unsigned int idx;
|
||
|
||
/* Find how long a run we can do. */
|
||
while (dst_address < link_order->size)
|
||
{
|
||
reloc = *parent;
|
||
if (reloc)
|
||
{
|
||
/* Note that the relaxing didn't tie up the addresses in the
|
||
relocation, so we use the original address to work out the
|
||
run of non-relocated data. */
|
||
BFD_ASSERT (reloc->address >= src_address);
|
||
run = reloc->address - src_address;
|
||
parent++;
|
||
}
|
||
else
|
||
{
|
||
run = link_order->size - dst_address;
|
||
}
|
||
|
||
/* Copy the bytes. */
|
||
for (idx = 0; idx < run; idx++)
|
||
data[dst_address++] = data[src_address++];
|
||
|
||
/* Now do the relocation. */
|
||
if (reloc)
|
||
{
|
||
switch (reloc->howto->type)
|
||
{
|
||
case ABS32CODE:
|
||
calljx_callback (input_bfd, link_info, reloc,
|
||
src_address + data, dst_address + data,
|
||
input_section);
|
||
src_address += 4;
|
||
dst_address += 4;
|
||
break;
|
||
case ABS32:
|
||
bfd_put_32 (input_bfd,
|
||
(bfd_get_32 (input_bfd, data + src_address)
|
||
+ get_value (reloc, link_info, input_section)),
|
||
data + dst_address);
|
||
src_address += 4;
|
||
dst_address += 4;
|
||
break;
|
||
case CALLJ:
|
||
callj_callback (input_bfd, link_info, reloc, data,
|
||
src_address, dst_address, input_section,
|
||
false);
|
||
src_address += 4;
|
||
dst_address += 4;
|
||
break;
|
||
case ALIGNDONE:
|
||
BFD_ASSERT (reloc->addend >= src_address);
|
||
BFD_ASSERT ((bfd_vma) reloc->addend
|
||
<= input_section->_raw_size);
|
||
src_address = reloc->addend;
|
||
dst_address = ((dst_address + reloc->howto->size)
|
||
& ~reloc->howto->size);
|
||
break;
|
||
case ABS32CODE_SHRUNK:
|
||
/* This used to be a callx, but we've found out that a
|
||
callj will reach, so do the right thing. */
|
||
callj_callback (input_bfd, link_info, reloc, data,
|
||
src_address + 4, dst_address, input_section,
|
||
true);
|
||
dst_address += 4;
|
||
src_address += 8;
|
||
break;
|
||
case PCREL24:
|
||
{
|
||
long int word = bfd_get_32 (input_bfd,
|
||
data + src_address);
|
||
bfd_vma value;
|
||
|
||
value = get_value (reloc, link_info, input_section);
|
||
word = ((word & ~BAL_MASK)
|
||
| (((word & BAL_MASK)
|
||
+ value
|
||
- output_addr (input_section)
|
||
+ reloc->addend)
|
||
& BAL_MASK));
|
||
|
||
bfd_put_32 (input_bfd, (bfd_vma) word, data + dst_address);
|
||
dst_address += 4;
|
||
src_address += 4;
|
||
|
||
}
|
||
break;
|
||
case PCREL13:
|
||
{
|
||
long int word = bfd_get_32 (input_bfd,
|
||
data + src_address);
|
||
bfd_vma value;
|
||
|
||
value = get_value (reloc, link_info, input_section);
|
||
word = ((word & ~PCREL13_MASK)
|
||
| (((word & PCREL13_MASK)
|
||
+ value
|
||
+ reloc->addend
|
||
- output_addr (input_section))
|
||
& PCREL13_MASK));
|
||
|
||
bfd_put_32 (input_bfd, (bfd_vma) word, data + dst_address);
|
||
dst_address += 4;
|
||
src_address += 4;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
}
|
||
}
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return data;
|
||
error_return:
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Build the transfer vectors for Big and Little-Endian B.OUT files. */
|
||
|
||
#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
|
||
#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
|
||
|
||
#define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
|
||
#define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
|
||
#define b_out_bfd_final_link _bfd_generic_final_link
|
||
#define b_out_bfd_link_split_section _bfd_generic_link_split_section
|
||
#define b_out_bfd_gc_sections bfd_generic_gc_sections
|
||
#define b_out_bfd_merge_sections bfd_generic_merge_sections
|
||
|
||
#define aout_32_get_section_contents_in_window \
|
||
_bfd_generic_get_section_contents_in_window
|
||
|
||
extern const bfd_target b_out_vec_little_host;
|
||
|
||
const bfd_target b_out_vec_big_host =
|
||
{
|
||
"b.out.big", /* name */
|
||
bfd_target_aout_flavour,
|
||
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
||
BFD_ENDIAN_BIG, /* hdr byte order is big */
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
|
||
'_', /* symbol leading char */
|
||
' ', /* ar_pad_char */
|
||
16, /* ar_max_namelen */
|
||
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
||
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
|
||
{_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
|
||
bfd_generic_archive_p, _bfd_dummy_target},
|
||
{bfd_false, b_out_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, b_out_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
BFD_JUMP_TABLE_GENERIC (aout_32),
|
||
BFD_JUMP_TABLE_COPY (_bfd_generic),
|
||
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
||
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
|
||
BFD_JUMP_TABLE_SYMBOLS (aout_32),
|
||
BFD_JUMP_TABLE_RELOCS (b_out),
|
||
BFD_JUMP_TABLE_WRITE (b_out),
|
||
BFD_JUMP_TABLE_LINK (b_out),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
& b_out_vec_little_host,
|
||
|
||
(PTR) 0,
|
||
};
|
||
|
||
const bfd_target b_out_vec_little_host =
|
||
{
|
||
"b.out.little", /* name */
|
||
bfd_target_aout_flavour,
|
||
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
||
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
|
||
'_', /* symbol leading char */
|
||
' ', /* ar_pad_char */
|
||
16, /* ar_max_namelen */
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
||
|
||
{_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
|
||
bfd_generic_archive_p, _bfd_dummy_target},
|
||
{bfd_false, b_out_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, b_out_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
BFD_JUMP_TABLE_GENERIC (aout_32),
|
||
BFD_JUMP_TABLE_COPY (_bfd_generic),
|
||
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
||
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
|
||
BFD_JUMP_TABLE_SYMBOLS (aout_32),
|
||
BFD_JUMP_TABLE_RELOCS (b_out),
|
||
BFD_JUMP_TABLE_WRITE (b_out),
|
||
BFD_JUMP_TABLE_LINK (b_out),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
& b_out_vec_big_host,
|
||
|
||
(PTR) 0
|
||
};
|